how to do not merge results

[Marco Antonio Stranisci]

Hi,

(and thanks for your previous support that was precious)

I have a new question, though.

For a KG embedding task I need the output of my mappings to be only of the type s,p,o

However, Ontop automatically aggregate objects. So, in some cases I have such a result:

:Fargo :writtenBy :JoelCohen, :EthanCohen

Instead of

:Fargo :writtenBy :JoelCohen

:Fargo :writtenBy :EthanCohen

I tried some of the Ontop properties, but no one solved my issue. I also tried the "avoidPostProcessing" option that returned me that error: "Unexpected exception: Was expecting a unique and known DB term type to be extracted for the SQL variable g"

Thanks in advantage for your help

Best

Marco

[Guohui Xiao]

Hi Marco,

If I understood correctly, you materialize triples with Ontop, and you expect the generated RDF files consisting of triples line by line. 

The question is about how to format the generated triples. Ontop also supports popular formats. What you are looking for is the "ntriples" format (https://www.w3.org/TR/n-triples/)

You can use the following option to specify output format:

 -f <outputFormat>, 

--format <outputFormat> The format of the materialized ontology. 

Default: rdfxml 

This options value is restricted to the following set of values: rdfxml, turtle, ntriples, nquads, trig, jsonld 

See the doc for more info:

https://ontop-vkg.org/guide/cli.html#ontop-materialize

Best,

Guohui

[Marco Antonio Stranisci]

it works perfectly,

thanks a lot!

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